Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b046df5d54a7953…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 06:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5fed42d5166c587b64531f8ec0457835 SHA-1: 14852c3a98ca52890c94671048400fbda5f07d58 SHA-256: 9b046df5d54a795313c06cd2b42e3017fa8b34cb291324590f1e2792c81c6e98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://racecross.com/upload/edito_fckeditor/file/babunukafilurovez.pdf In PDF document text
    • https://suacuachuyennghiep.com/uploads/files/nidobo.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/falagen.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/90734816083.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/fuwujalexusulese.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210913085800.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210904045058.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/kofupodasin.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/fuzivobapevonusomokaz.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/volitewon.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161327f999c24c---18625331793.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdf57d67fb---femafemifimugebukaz.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/99620099654.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/45050437581.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/vufog.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/4883410454.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/kimezujagikatuvivumuva.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/vojadovusixuwatedi.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e357656fa---55477903142.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/164896712613c68900b356.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/gerimowaga.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd951bc86---61076866440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=moonlight+sonata+movement+3+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 18128 bytes
SHA-256: ae2a8cb0ab953957d3f4aac003199a49bbd52653cbcc26d036bc692a4f4a487a
font_02_sfnt_off00011002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11002 11076 bytes
SHA-256: 41742c85b9920090f8ea07920ea30d858f3edfbcf2d172794ecadf349f11c452